Of 56 counties in the Treasure State, Treasure County is 53rd in terms of its size (984 square miles). Treasure County is in Southeast Montana. There is approximately 1,000 acres of lakefront property for sale in Montana's Treasure County based on recent Land Network data. The combined market value of land and rural real estate for sale here is around $400,000. Browse all waterfront property for sale in Treasure County on the Land Network to find the marina, lakefront and other recreational property that meets your needs, from waterside land perfect as a retirement investment to existing residential waterfront land and property for hunting, fishing and other outdoor-recreation pursuits! The most common type of land for sale by combined acreage in Treasure County is house.